Abstract
The development of biological advanced treatment of dioxins in the pulp waste water using immobilized microbes was studied. Microorganisms were immobilized by photo-crosslinked resin with powdered activated carbon (PAC). The effect of adsorption capacity of PAC, adaptation of microorganisms to pulp waste water, and biodegradability of dibenzofuran (DBF), carbon based skeletal structure of dioxins were examined.The results obtained from this study were as follows.1) Immobilized microorganisms with PAC removed DBF more effectively due to the adsorption and concentration effect of PAC.2) Immobilized microorganisms such as Pseudomonas aeruginosa effectively removed organic matter and degraded DBF in the waste water.3) DBF removal rate and ATP content of immobilized microorganisms were more rapid and higher than those of suspended microorganisms.4) The adsorption capacity of PAC was reduced due to gel inhibition effect, however, immobilized PAC has worked effectively to DBF treatment.
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